An investigation is under way after a man died when he was swept out to sea while trying to retrieve a football on a south west Wales beach.

Mark Gallagher, who was 37 and from Sandfields, Port Talbot, had been drinking with a friend while fishing off Swansea beach.

The man died in Swansea's Singleton hospital

They were having a kick-about when the ball landed in the water.

Mr Gallagher was attempting to reach the ball when he lost his balance and was struck by a wave.

The incident happened behind County Hall in Swansea at about 1900 BST on Sunday.

Mr Gallagher's friend jumped in to try to save him and they were helped by passers-by.

Eye-witness David Grimsley, 35, said: "I was walking past with my wife and two children when I could see them in trouble.

"I took off my shoes and coat to jump in.

"When I reached them, I could see one was unconscious - he was in real trouble.

"The other was a much stronger swimmer."

RNLI advice

Eating and drinking (particularly alcohol) before swimming may give you cramps If you see anyone in trouble, dial 999 and ask for Coastguard Check the weather and tides before you leave Keep children within reach at all times Always tie inflatables to the shore Keep clear of cliff edges - they can be slippery when wet

Both men were rescued by inshore lifeboat and taken to Swansea's Singleton Hospital where Mr Gallagher later died.

The second man is still in hospital suffering from hypothermia but is not believed to be in any danger.

Coastguards said although there was a high tide the sea was not particularly rough at the time of the incident.

Mumbles inshore lifeboat was launched after receiving a report that three people were in the water.

General warning

Acting cox, Paul Clark said: "There was a three to four foot swell in that area and when we got to the scene two people had managed to get themselves out of the water.

"I am surprised the person didn't survive but it is difficult to know what other factors are involved.

"The RNLI does issue a general warning to everybody that alcohol and water do not mix unless it is in a glass," he added.

The coroner has been informed and an inquest will be held.